21545680

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20717}}^1$

素因数の和:20743

約数の個数: 40

約数和(自身を含む): 53949672

約数和(自身を除く): 32403992

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20717, 41434, 82868, 103585, 165736, 207170, 269321, 331472, 414340, 538642, 828680, 1077284, 1346605, 1657360, 2154568, 2693210, 4309136, 5386420, 10772840, 21545680]

約数ペア:

[(1, 21545680), (2, 10772840), (4, 5386420), (5, 4309136), (8, 2693210), (10, 2154568), (13, 1657360), (16, 1346605), (20, 1077284), (26, 828680), (40, 538642), (52, 414340), (65, 331472), (80, 269321), (104, 207170), (130, 165736), (208, 103585), (260, 82868), (520, 41434), (1040, 20717)]